Spacing-escapement and carriage-feeding mechanism for type-writing machines.



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SPCING ESCAPEMENT AND CARRIAGE FEEDING MECHANiSM- FR TYPE (No Model.)

, A 5 F0 v0 3 auf@ M Z 7 9 M/ W y. ,who 9 /f MLM wl A Patented July I7, |900. l E. s. sumen. SPACING ESGAPEMENT AND CARRIAGE FEEDING MECHANISM FUR TYPE WRITING MACHINES.

(Application led Apr. 20, 1900.) (llo Model.) 2 Shaqts-Sheet 2;

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'Nrrnn 'Yarns ELMER S. SHIMER, OF MILTON, PENNSYLVANIA. Y

SPACING-ESCAPEMENT AND CARRlAGE-FEEDING MECHANISIVI FOR TYP-WRITING MACHINES.

srnqrrronrroiv forming part of Letters raten-t No. 654,029, dateatuiy 17', 1900. Appia-souhaitait20,1900. saisine. 13,619; (No mba-.10

.To @ZZ whom it may concern.-

Beit known that I, ELMEP. S. SHIMER, a citizen of the United States, residing at Milton, in the county of Northumberland and State of Pennsylvania, have invented new and useful Improvements in Spacing-Escapements and Carriage-Feeding Mechanisms for Type- Writing Machines, of which the following is a specification.

My invention relates to spacing-escapements and carriage-feeding mechanisms for typeewriting machines; and the objects of the same are to provide a simple, efficient, and easily operated rack-and-pinion spacingescapement and reliable means forv disengagement thereof to permit the carriageto be shifted or returned at the end of each line printed. I attain these objects by means of the construction shown in the accompanying drawings, which form a part of this specification, and in which- Figure lis a plan view of so much of a type- Writing machine as will serve to illustrate my improvements. Fig. 2 is a rear elevation of the mechanism. Fig. 3 is a vertical section through the frame. Fig. lis a detail perspective View of the spacing-rack and contiguous parts. Fig. 5 is a side view of the pinion and clutch. Fig. 6 is a detail section of the escapement-wheels.

Like characters designate like parts wherever they occur in the different views.

The numeral 1 designates the guide-rail for the carriage. This rail is provided with central longitudinal grooves 2, which form a raceway for the balls 3, supported in channeled bars 4, rigidly attached to the frame of the machine. The carriage is pivoted to the guide-rail 1 upon lugs 5, which extend forward from said guide-rail. Lugs 6 extend to the rear from guide-rail 1. The rack 8 is provided with arms 9, pivotally connected to a rod 7. Secured to the upper surface of the rack 8 and projecting outward beyond the teeth 10 is a plate 11, extending longitudinally the full length of said rack. The vertical spacing-shaft 12 is journaled at its lower end in a plate or bracket 13 and near its upper end is supported in a plate 14, secured to the top of the table a of the machine. Secured to said spacer-shaft, near the lower end thereof, by means of a set-screw 15' is an escape- Yand ratchet.

ment-wheel 15, formed with two opposite slots 16 and with an elongated opening 17. Se-

cured to this wheel is one end of a coiled spring 18, the other end of which is secured to a loose escapement-wheel k19, located below the wheel 15 and journaled on said shaft 12. This wheel is provided with an opening 20, which coincides with the opening 17, the

object of these openings being to accommodate the spring 18. Secured to said wheel19 are two upwardly-extending headed screws 21, which pass through the slots 16, said slots being slightly larger than the Shanks of the screws 21, so as to allow said wheels to have an alternate intermittent movement for feeding `the carriage to make the letter and word spaces, as will be described. The screws and slots bear such relation to each other and to the wheels that as a key is depressed the loose wheel will move a distance a fraction less than the fixed wheel and will complete its stroke when the key is released, at which time the fixed wheel and its shaft will move a distance equal to a letter-space,

this movement being effected through the medium of the carriage-driving spring. A pawl 21, mounted rigidly on a rock-shaft 22, engages the teeth 23 on the wheels 15 and 19, and the rock-shaft is journaled at its ends in the frame of the machine and is operated by the type-bars 24E. Lu gs 25 extend outward from the rock-shaft, and connecting-rods 26 are attached to the lugs and to the crossbar 27, located immediately under the keybars 24, so that when any of the keys are struck the rock-shaft will move the pawl 21a and permit the escapement-wheel to move the distance of one tooth. A spring 21b returns the rock-shaft 22 to its original position. .Iournaled loosely upon shaft 12, near its upper end,is a pinion 28,having an upper ratchetface 29 and a groove 30 between the pinion The teeth of the rack 8 fit the cogs on the pinion 28, and the plate 11 rests in the groove 30 at the Vtop of the pinion. The ratchet-face 29 is held in mesh with the rigidly-iixed ratchet 31 by the spiral spring 32, which surrounds the shaft 12 and-rests at its lower end on a collar 83, adjustably fixed -to the shaft by a set-screw 34:. The upper IOO to the frame of the machine, has an arm 37, which normally rests on one of the arms 9a of the rack, and when the lever is actuated against the stress of its spring 38 the a'rm 37 bears upon a button 37 and the rack is depressed and the plate 11 pushes the pinion down and disengages the ratchet-face 29 from the ratchet 3l. The carriage may then be moved in either direction, the pinion being free to revolve in either direction, the cogs on the pinion always fitting the teeth of rack 8.

The operation is as follows: Then it is desired to shift the carriage, the lever is actuated against the tension of spring 38, the arm 37 then riding over the end of arm 9 and sliding up over the button 37, thus depressingthe plate ll sufticiently to release the ratchets 29 3l and permit the carriage to be shifted. y

Having thus fully described my invention, what I claim is- 1. In a type-Writing machine, a carriagefeeding mechanism consisting of a vertical spacing-shaft and means to rotate it inter` mittently, a pinion loosely mounted on said shaft, a ratchet-face on Ithe pinion, a ratchet with which it engages, a rack in mesh with the pinion, and a plate secured to and projecting over the rack for disengagng the ratchet to'shift the carriage, substantially as described.

2; In a type-Writing machine, a` vertical spacing-shaft having escapement-Wheels thereon, adapted to be actuated by a rockshaft controlled by the key-bars, a pinion on the spacing-shaft, said pinion carrying a ratchet-face and having a groove formed between `the ratchet-face and pinion, a rack meshing With the pinion, a plate secured to and projecting over the rack, said plate sliding in the groove, and means for depressing the plate to disengage the ratchet to permit the carriage to be shifted.

3. A carriage-feeding mechanism for type-- Writing machines, consisting of a rack, a pinion in mesh with said rack and loosely journaled on a vertical spacing-shaft, a

ratchet carried by the pinion, a spring for holding the ratchet in engagement, and a plate secured to said rack and projectinglbeyond the teeth thereof for depressing the pinion to release the ratchet to permit the carriage to be shifted, substantially as de-x scribed. I

In testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

ELMER s. SHIMER.r Witnessesi W. H. BECK, C. F. BALLIET. 

